Temperature alarm device.



A. GOLDSTEIN. TEMPERATURE ALARM DEVICE. APPLIOA'IIOVN I'IL-nn mmza, 1010.

966,904; Patented Aug.9 ,1910

a 21.4. 1/1.! X '////i| 777/77/2 7777777 l/lY/T/H/Yif/H/H/ 7 I m q 75 UNITED s'rnrns PATENT OFFTUE.

ALBERT GOLDSTEIIN, OF NEW YORK, N. Y ASSIGNOR T0 INTERNATIONAL ELECTRIC PROTECTION COMPANY, A CORPORA'ITON, 013 NEW YORK. V

TEMPERATURE ALARM DEVICE.

Specification of Letters Patent.

PatentedAu t 1910.

Application filed March 28, 1910. Serial. Jfi'e. 551,819.

To all whom it may concern:

Be it known that I, ALBERT t roLns'rnin, a citizen of the United States, residing at New York, in the county of NewYork and State of New York, have invented a certain new and useful Improvement in Temperature Alarm Devices, of which the following is a specification.

The invention relates to that type of temperature alarm devices in which is comprised a pipe and an alarm actuated by the impulse produced by a rise in external temperature, in the air confined in said pipe.

The object of the invention is to cause an alarm to be sounded in event of a break in said pipe.

The invention consists in a line conchuztor within said pipe, and an electrical alarm device so arran ed as to be actuated upon the rupture of said conductor.

In the accompanying drawingsfFigure 1 shows the mechanical parts of my temperature alarm in section, and the electrical parts diagrammatically. Fig. 2 is a sectional view of a part of the pipe and insulated wire, illustrating the short-circuiting of wire and pipe due to a bend and compressionot said pipe. v

Sin'iilar numbers oi. rct'eroni'ze indicate like parts.

The pipe I is of metal andniay have a bore. about l/20 of an inch in (lltLl'IlGtIOl. It may be of indefinite length to extend around 01' throughout the space to be protected against rise of temperature. the pipe is open and is received and supported in a plate 2 of insulating material. Above the open end of the pipe and preferably as close thereto as possible is supported a metal diaphragm 3, between which and the plate 52 a thin air space intervenes. Above the diaphragm is a contact 41 which is in circuit with a local battery 5, an alarm device 6 (here an electric bell) and with the diaphragm itself. The other end of the pipe 1 is closed with a plug 7 of insulating material tl'irough which extends a metal terminal 8. to which is connected one end of the wire 9 whichis covered with insulating material 17, and extends entirely through the pipe 1, to a point near the plate 2. and

vthen is connected to a terminal 10 which extends through an insulating bushingand is One end of connected to one pole of a battery 11. The other pole of said battery is connected to the pipe 1. nected to the pipe 1, through the coil of a magnet 12, which controls a switch 13. Said switch at contact 14 makes and breaks a local circuit including a battery E 5 and alarm device 16.

The pipe 1 operates in the usual way; any predetermined rise in temperature produc ing an impulse or wave in the body of confined air, which acts upon the diaphragm 3, causing said diaphragm to meet contact 4: and so establish circuit to alarm 6. The object of the inclosed wire 9 and its electrical attachments is to give warning of a break in the pipe which would obviously prevent the above-descri bed opera tion. Normally the circuit from battery 11 proceeds to Wire 9, magnet 12, pipe 1, and so back to battery. As a consequence, magnet 12 is energized and actuates its lever 13 to open the local circuit at 1 1. Should, however, a-break occur in the pipe and consequently in its, contained wire 9, magnet 12 at once fails, its switch 13 closes circuit at 14 and the-alarm 16 is continuously sounded so long as the break continues.

it abnormal contact should take place between wire 9 and pipe 1, as, for example, when the pipe is flattened at some point by external pressure, or by other leiorniation of the pipe,'as illustrated, for example, in Fig. 2, or if it should occur through moisture entering the pipe and accumulating as liquid trapped at a bend, then in the first two cases, the insulation of the wire may become impaired, especially .by the spreading of the threads it the covering be of sillf. In such event, electrical contact is estab lished between pipe 1 and wire 5), thus shorteircuiting the magnet 12, and so allowing the circuitincluding'. alarm It) to be closed. Similar short-eirci'iiting is. produced by trapped water if it can penetrate the insulation on wire 9. It is, therefore, prefc able to make the insulating covering of wire 9 of silk or other-material easily broken or penetratedin order to insure the operation of the alarm under the conditions before stated. A, choking of the pipe which, if taken place near the diaphragm, would, if

sufiicient to render the device inopera-tive'as The metal terminal 8 is also cona heat alarm, also cause the short-drcuiting .of pi e'and wire, is thus indicated by the soun mg ofalarm 16.

a pipe, analarm actuated by impulses produced in the airtherein, a Wire Within said p1pe, a'nd an electrical alarm actuated upon the rupture of said wire.

1 2. Atemperature alarm device comprising apipe, a diaphragm supported in front of 1. Atemp er ature alarm-device comprising in circuit with said conductor, and 'an alarm circuit controlled by said'circuit closer.

3. A temperature alarm device comprising a pipe, an alarm actuated b impulses produced in the air therein, a wlre covered with insulating material within said pipe, and an electrical alarm operated by abnormal shortcircuiting between said Wire and said pi e.

In testimony whereof I have afiixe my signature in presence of two witnesses.

ALBERT GOLDSTEIN. Witnesses:

GERTRUDE T. lori rnn, MAY T. MCGARRY. 

